Drum magnetic separators



P 1969 A. a. TURNOCK 3,438,495

DRUM MAGNETIC SEPARATORS Filed Dec. 27, 1966 Sheet of 2.

KWW

III

April 15,1969 A. e. TURNOCK 3,433,495

DRUM MAGNETIC SEPARATORS Filed Dec. 27, 1966 Sheet i of 2 United StatesPatent 3,438,495 DRUM MAGNETIC SEPARATORS Arthur George Turnock, SuttonColdfield, England, as-

signor to Electromagnets Limited, Hockley, England, a corporation of theUnited Kingdom of Great Britain and Northern Ireland Filed Dec. 27,1966, Ser. No. 604,931 Claims priority, application Great Britain, Oct.19, 1966, 46,643/ 66 Int. Cl. B03c 1/02 US. Cl. 209219 Claims ABSTRACTOF THE DISCLOSURE A drum magnetic separator in which a rotatable drumand a magnet unit are mounted independently of one another and in whichprovision is made for adjusting the mounting of the magnetic unit or therotatable drum to obtain the required clearance between these twoelements.

This invention has reference to drum magnetic separators.

Drum magnetic separators as constructed heretofore are subject to thedisadvantages that dilficulty is experienced in fitting the outer drumor shell over the magnet to obtain the required clearance between themagnet unit and the rotatable drum and that the conventional manner orconstruction renders maintenance somewhat ditficult either in the caseof electrical servicing or mechanical damage to the drum.

The present invention has for its object to provide a drum magneticseparator which is of simplified construction, easy to assemble and notsubject to the foregoing disadvantages.

Accordingly the invention consists of a drum magnetic separator in whichthe rotatable drum and the magnet unit are mounted independently of oneanother.

The invention also consists of a drum magnetic separator in which therotatable drum and the magnet unit are mounted independently of oneanother and in which provision is made for adjusting the mounting of themagnetic unit or rotatable drum to obtain the required clearance betweenthe magnet unit and the rotatable drum.

The invention further resides in a drum magnetic separator constructedsubstantially as will be described hereinafter.

A manner of carrying the invention into efiect will now be describedwith particular reference to the accompanying drawings wherein:

FIGURE 1 is a front elevation of a drum magnetic separator in accordancewith the invention partly broken away for the sake of clearness,

FIGURE 2 is an end view of FIGURE 1,

FIGURE 3 is a fragmentary view of a modified form of drum for the drumseparator illustrated in FIGURES 1 and 2, and

FIGURE 4 is a fragmentary view in longitudinal section and on anenlarged scale of yet another modification of the drum separator asillustrated in FIGURES l and 2.

In the drawings like numerals of reference indicate similar parts in theseveral views.

According to the manner of carrying the invention into effect asillustrated in FIGURES l and 2 the magnet unit which may be in the formof a battery of permanent magnets or of electromagnets of conventionalconstruction is designated generically by the reference numeral and issupported by a base plate 101 having an upstanding section 102incorporating a crank 103. This upstanding section 102 is turnablymounted on a longitudinal shaft 11 which constitutes the axis aboutwhich the drum separator is required to rotate the end portions 111whereof are rotatably mounted in adjustable bearing blocks 12 carried byoppositely disposed composite fabricated end structures designatedrespectively 131 and 132. The upper end of the crank 103 is connected tothe end of the ram 141 of a hydraulic ram and cylinder mechanism ofknown kind the cylinder 142 whereof is pivotally mounted to a verticalmember 132a forming part of the fabricated end structure 132. Thebearing blocks 12 co-operate with screws 121 and 122 which respectivelypermit of the adjustment of the effective height of the bearing blocks12 and of its longitudinal position on the bed 133 forming part of therespective end structures 131, 132 as and for a purpose which will bedescribed hereinafter.

Adapted to be fitted around the magnet unit 10 and concentric with theshaft 11 is a cylindrical drum designated generically by the referencenumeral 16 which conveniently and as illustrated is assembled from twosimilar semi-cylindrical halves 161 and 162 provided with angle sectionplates 163 so that two halves 161, 162 may be bolted together toconstitute a cylindrical drum by means of bolts 163a as is clearlyillustrated in FIGURES 1 and 2, and separated as may be required.

At each end the drum 16 is provided with flanged reinforcing rings 164again formed in two parts with the drum 16 which are adapted to rest onflanged support wheels 18 mounted on axles 181 supported in bearingsmounted on the framework of the end structures 131, 132.

The main framework 19 is itself mounted on wheels 191 adapted to run ona rail track 25 so that the complete drum separator can be moved intoand out of position as required.

At one end the drum 16 is also provided with a gear ring 165 againformed in two parts the teeth whereof are adapted to mesh with the teethof a pinion 20 mounted on the same axle 18 as the relevant flangedsupport wheel 18. The axle 181 also carries at the outer end a sprocketwheel 21 adapted to be driven by endless chain 22 from an electric motor23 carried by a bed 231 adjustably mounted on end structure 132 so thatthe position of the bed 231 may be adjusted by means of screws 232 forcompensating for any slackness in the driving chain 22 in a manner whichwill be well known to those skilled in the art.

Adapted to bear on the interior of the drum 16 conveniently adjacent toeach end is a roller 24 carried by a forked bracket 241 the said bracket241 co-operating with springs 243 so that the rollers 24 thrust on theinner periphery of the drum 16 and force the flanged reinforcing rings164 into firm engagement with the respective support rollers 18.

The force exerted by the springs 243 may be adjusted by means of nuts244.

The cylindrical drum 16 may be open at the ends or provided with endcovers as may be preferred.

Conveniently the pole shoe 104 of the magnet unit 10 is given an arcuateformation as at as is clearly seen in FIGURE 2. I

The hydraulic ram 141 and cylinder 142 may be operated to swing themagnet unit 10 about bearings 12 and thereby adjust the angular positionof the magnet unit within the drum 16. This adjustability enables theposition of the magnetic field to be adjusted in order to adapt theseparator to operate effectively in a wide variety of differing types ofmaterials. v

As illustrated in FIGURE 3 the drum 16 is provided with externaladditives in the form of spikes 166 which become induced magnets whenthe separator is in use so that material to be separated has to followdevious paths between the said spikes 166 during a separating operationin a manner itself known.

not shown which serves to convey the material to be separated on to theperiphery of the drum 16.

Moreover the invention permits the zones of maximum intensity producedby a magnet i.e. the spacesgbetween the pole shoes or plates to be morefully utilizedlhan in conventional known types of drum magneticseparators. For example as illustrated in FIGURE 4 the drum 16 is givena castellated formation as seen in longitudinal section and the poleshoes 105 are arranged and adjusted to have a Working fit Within theupstanding castel-- lations 168. Consequently if the matter to beseparated is directed into the depressions 167 between adjacentcastellations the matter would be subjected to magnetic force of thegreatest intensity and thus make for the maximum possible ferrousextraction.

It will be appreciated that the drum magnetic separator as hereinbeforedescribed is simple in construction and easier to manufacture andassemble than drum magnetic separators of conventional type, and ensuresthe concentric setting of the drum 16 relatively 'to the magnet unit asmay be required.

Furthermorgthe drum magnetic separator of this invention facilitatescooling of the separator when in use as end covers may be dispensed withand furthermore; the construction facilitates servicing either forelectrical.

or mechanical faults since by removing one half of the drum unobstructedaccess can be gained to the magnet unit as required.

I claim:

1. A drum magnetic separator comprising:

(a) a drum rotatable about the axis thereof,

(b) a magnet unit disposed within said drum,

(c) mounting means for mounting the magnet unit for pivotal movementabout an axis which is parallel to the axis of the drum,

(d) saiddrum having castellations extending around the diameter thereofto define openings therebetween, and

(c) said magnet unit having magnet shoes engaged in said openings with aworking fit.

2. A drum magnetic separator comprising:

(a) a drum rotatable about the axis thereof,

(b) a magnet unit disposed within said drum,

(c) mounting means for mounting the magnet unit for pivotal movementabout an axis parallel to the axis of the drum, and in which saidmounting means comprises a longitudinal shaft and bearing blockstherefor, and

f (d) adjustment means for adjusting the position of the mounting meansand thereby adjusting the distance from the magnet unit to the drum.

3. A drum separator according to claim 2, in which said magnet mountingmeans comprises a longitudinal shaft and.bearingblocks therefor and saidadjustment means comprises means for adjusting the height and lateraldisplacement of said bearing blocks.

' 4. A drum magnetic separator according to claim 2, comprising a ringgear mounted on the drum and a driving pinion meshing with the ring gearto drive the drum.

5. A drum magnetic separator according to claim 2 in which said drum hascastellations extending around the diameter thereof to define openingsthere between and said magnet unit has magnet shoes engaged in saidopenings with a working fit.

References Cited UNITED STATES PATENTS 2,287,804 6/1942 Johnson 209212 X2,785,801 3/1957 Laurila 209-223 2,854,137 9/1958 Grunel 210-223 X2,945,590 7/1960 Stearns 209219 X FOREIGN PATENTS 711,991 6/1965 Canada.

16,643 1905 Great Britain. 483,748 4/ 1938 Great Britain. 938,810 10/1963 Great Britain.

OTHER REFERENCES Laurila (B), German Printed Application No. 1,076,-051, February 1960, pp. 209-219.

TIM R. MILES, Primary Examiner.

